Sigma and Barb, 24 April 2011. Barb was born here, to another female (Devil Tail), the previous September (2010).
6 August: We return to the dens and find Sigma at large rock near her den that will be her nest site. Toward the end of her pregnancy, she settles on the west side of the rock as her main basking area, so we set up a timelapse camera there.
Between 3 and 4 September, the squirrel appears to be investigating the nest rock, but never when Sigma is on the surface.
On 5 September, Sigma and the squirrel meet: